• Title/Summary/Keyword: Energy and Consumption

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A study on energy saving and economic analysisy calculation of far-infrared radiation oven (원적외선 복사오븐의 에너지 절감평가 및 경제성분석)

  • Kim, Yong-Ha;Yoo, Jeong-Hui;Lee, Gwong-Sung;Heo, Dong-Lyul;Yon, Hyeon-Su;Lee, Seong-Hui
    • Proceedings of the KIEE Conference
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    • 2011.07a
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    • pp.1270-1271
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    • 2011
  • A study on the energy consumption(weigh against of the energy consumption for analyzed oven) and the energy consumption of follow cooking time (weigh against of cooking time for analyzed oven)through weigh against far-infrared radiation oven and other system. for this study, analysis the energy consumption follow temperature change and calculate the energy consumption until come to saturation temperature. also, the energy consumption is measured for food analysis follow cooking time. The energy reduced cost and time is estimated.

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A Study on the Effect of Envelope Factors on Cooling, Heating and Lighting Energy Consumption in Office Building (사무소 건물의 외피요소가 냉난방 및 조명에너지 소비에 미치는 영향에 관한 연구)

  • Son, Chang-Hee;Yang, In-Ho
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.26 no.2
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    • pp.8-17
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    • 2012
  • The objective of this study is to perform an analysis of the heat(heating and cooling) and lighting energy consumption according to the window area ratio and the application of horizontal louver, which is external shading device installed for the purpose of energy savings in office buildings. For this, a building was chosen as a typical example, and the heat and lighting energy consumption was calculated by using the daylight and building energy analysis simulation. The results showed that the total energy consumption, when the lighting control was applied, was reduced by an average of 11.49[%] compared to when there was no lighting control. The smaller the glazing ratio is, the less the total energy consumption is. Also, the application of the horizontal louver increases the total energy consumption under the same condition of glazing ratio.

Heating and Cooling Energy Conservation Effects by Green Roof Systems in Relation with Building Location, Usage and Number of Floors

  • Son, Hyeong Min;Park, Dong Yoon;Chang, Seong Ju
    • KIEAE Journal
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    • v.14 no.2
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    • pp.11-19
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    • 2014
  • Building energy consumption takes up almost 25% of the total energy consumption. Therefore, diversified ways, such as improving wall and window insulation, have been considered to reduce building energy consumption. Recently, green roof system has been explored as an effective alternative for dealing with reducing heating and cooling energy, thermal island effect and improving water quality. However, recent studies regarding a green roof system have only focused on building energy reduction without considering the applied usage, location, and story of the green roof system. Therefore, this study pays attention to the heating and cooling energy in relation to the applied usage, location, and story of a green roof system for investigating its impact on energy reduction. The result of simulations show that the reduction in heating energy consumption is higher when applied to Cherwon-gun province which has a continental climate condition, compared to the city of Busan that is distinguished by its warm climate. Cooling energy saving turns out to be higher when the green roof system is applied to Busan in comparison with Cherwon. As for the applied usage or function of the building, residential space acquires the highest heating and cooling energy saving effect rather than commerce, educational or office space because of HVAC's running time based on usage. When it comes to the story of the green roof, both heating and cooling energy saving become the highest when the green roof is applied to single-storied buildings. The reason is that single story building is affected by the ground largely. Generally, the variations of heating energy consumption are larger than the cooling energy consumption. The outcome of the simulations, when a green roof system is applied, indicates that the energy consumption reduction rate is dynamically responding to the applied usage, location, and story. Therefore, these factors should be counted closely for maximizing the reduction of energy consumption through green roof systems.

A Study on the Improvement Plans of Energy Performance in University Building through the Analysis of Energy (에너지 해석을 통한 대학건물의 에너지 성능개선 방안에 관한 연구)

  • Jung, Jae-Woong;Kim, Dong-Woo;Seok, Ho-Tae;Yang, Jeong-Hoon
    • Journal of the Korean Solar Energy Society
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    • v.30 no.1
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    • pp.50-60
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    • 2010
  • Today, the amount of energy consumption in the university campuses is huge. The effort for the energy consumption reduction in university campuses is certainly needed by the following reason; first, contribution to the greenhouse gas discharge reduction demand. Second, energy cost reduction in university campus. Third, contribution to the improvement of the social awareness as the maximum higher educational institutions. The energy consumption analysis of current situation has to be executed for the energy consumption reduction in university campus. The energy reduction possibility in which it exists in university campuses can be understood through the energy consumption analysis. And the application is possible as fundamental data of the policy establishment for the effective energy reduction in university campuses. Especially, the best way to reduce the energy consumption in university campuses that is the energy consumption reduction of buildings. Accordingly, this study derived the plans for improving the performance of energy in the university building by analyzing case study, so this study analyzed the performance of energy for the university building through VE, a program for the analysis of building energy. Based on this result, this study classified the plans improving the efficiency of energy in university building into the plan for passive control and active control respectively, and suggested some concrete plans, and finally evaluated the performance of decreasing energy consumption for each plan.

Effect of Measuring Period on Predicting the Annual Heating Energy Consumption for Building (연간 건물난방 에너지사용량의 예측에 미치는 측정기간의 영향)

  • 조성환;태춘섭;김진호;방기영
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
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    • v.15 no.4
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    • pp.287-293
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    • 2003
  • This study examined the temperature-dependent regression model of energy consumption based on various measuring period. The methodology employed was to construct temperature-dependent linear regression model of daily energy consumption from one day to three months data-sets and to compare the annual heating energy consumption predicted by these models with actual annual heating energy consumption. Heating energy consumption from a building in Daejon was examined experimentally. From the results, predicted value based on one day experimental data can have error over 100%. But predicted value based on one week experimental data showed error over 30%. And predicted value based on over three months experimental data provides accurate prediction within 6% but it will be required very expensive.

Energy Consumptions and Daylight Illumination levels of a Multi-beded Patient Room according to the Window Shapes and Shading (창의 형태 및 차양 계획에 따른 다인 병실의 에너지소비량과 주광조도의 평가 및 분석)

  • Choi, Changdae;Kwon, Soonjung;Kim, Sunsook
    • Journal of The Korea Institute of Healthcare Architecture
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    • v.18 no.3
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    • pp.29-39
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    • 2012
  • Window and shading designs have a great influence on energy consumption and daylighting in buildings. As far as energy is concerned, small window area is advantageous. But it is not good to the patient healing in hospital. So it is important to find out the optimum window shape which is favorable for both energy consumption and patient healing. In this study, annual energy consumption and daylight illumination levels were analyzed according to the window shapes and shading devices for a multi-beded patient room in hospitals. The simulations were conducted for 19 different cases by COMFEN 4.0 computer simulation program. The results of this paper are as follows. First, window to wall area ratio and shading devices have great influences on annual energy consumption. But it is a problem in that they decrease significantly daylight level in bed room. Second, considering the same energy consumption, reducing the width of window rather than the hight of window is desirable for the secure of daylight level. Third, increase of the number of horizontal shade is not desirable in south face of the building for the energy consumption and daylight level. Fourth, sun shade is not necessary in north face of the building for the energy consumption and daylight level.

Deriving Factors Affecting Energy Usage for Improving Apartment Energy Consumption Evaluation (공동주택 에너지 사용량 평가 개선을 위한 에너지 사용량 영향 요인 도출)

  • Eum, Mi-Ryeong;Hong, Won-Hwa;Lee, Ji-Ae
    • Journal of the Architectural Institute of Korea Structure & Construction
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    • v.34 no.7
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    • pp.27-34
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    • 2018
  • The energy consumption of apartment houses is affected by various factors. The criteria for assessing current energy usage are area, region and purpose. The purpose of this study is to obtain the reliability of the method of evaluating the existing energy consumption certificate and to derive usable evaluation factors according to the correlation of factors affecting energy consumption. The research process collects energy usage data for apartment houses in Daegu and calculates statistical results through correlation analysis and multiple regression analysis. As a result, it was found that the power energy is influenced by the yearly factor of physical characteristics, and the heat energy and total energy usage are influenced by the energy source which is energy characteristic factor.

The Influence of Unit Plan Shapes to the Energy Efficiency of Collective Housing Simulated by ECO2 Software (ECO2 프로그램을 이용한 공동주택의 단위세대 평면 형태에 따른 에너지 효율 평가)

  • Kim, Chang-Sung
    • KIEAE Journal
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    • v.15 no.5
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    • pp.89-94
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    • 2015
  • Purpose: Various policies to reduce the energy consumption have been carried out to save Earth environment against global warming and environmental pollution in many countries. Energy consumption of buildings in Korea has reached 24% of total energy consumption, and energy consumption of apartment has been continuously increasing. Therefore, Korea government has executed building energy efficiency rating certification system to control energy consumption of buildings. Method: This study was conducted to evaluate the energy performance of apartment unit plans according to the increasement of front width of unit plans, and tried to present the basic data to design more energy conscious unit plans for apartments. For the study, three shapes of unit plans -the 2Bay, 3Bay and 4bay unit- were selected for imput models. They were simulated using ECO2 software to assess building energy efficiency rating certification in Korea. Result: According to the results, in cases that balcony windows were not installed, the primary energy consumption of the 3Bay and 4Bay units were less than 2Bay unit, respectively, 0.1% and 2,5%. The primary energy consumption of the 3Bay and 4Bay units, in cases that balcony windows were installed, was less than 2Bay unit, respectively, 1.7% and 3.2%.

Prediction of Machine Tool's Energy Consumption during the Cutting Process (공작기계의 절삭공정 소비 에너지 예측기술)

  • Lee, Chan-Hong;Hwang, Jooho;Heo, Segon
    • Journal of the Korean Society for Precision Engineering
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    • v.32 no.4
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    • pp.329-337
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    • 2015
  • In this paper, a simulation based estimation method of energy consumption of the spindle and feed drives for the NC machine tool during the cutting process is proposed. To predict energy consumption of the feed drive system, position, velocity, acceleration and jerk of the table are analyzed based on NC data and then the power and energy are calculated considering friction force and mass of the stages. Energy consumption of the spindle is estimated based on models from acceleration motion of rotating parts, friction torque and power loss of motors. Moreover, simulation models of cutting power and energy for the material removal along the NC tool paths are proposed.

Analysis of Energy Consumption and Research on Energy Saving of Lighting and Coo1ing Energy of a Superstore (대형마트의 조명 및 냉방 에너지 분석 및 에너지 절감 연구)

  • Bae, Chang-Hwan;Kim, Young-Il;Chung, Kwang-Seop
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
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    • v.23 no.5
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    • pp.342-348
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    • 2011
  • This study analyzes the current and after retrofit energy consumption of lighting and cooling system of a superstore in Seoul. Energy consumption data were measured and collected with a measurement system. Annual energy consumption was calculated using TRNSYS program. After replacing lighting and chiller with higher efficiencies, annual TOE consumption decreased from 1,066 before retrofit to 832 after retrofit, saving 234 TOE (22%) in total. Similarly, total annual $TCO_2$ consumption decreased from 2,214 to 1,721, reducing 493 $TCO_2$ (22%) during this pilot study.